Iozone: Performance Test of File I/O Version $Revision: 3.483 $ Compiled for 64 bit mode. Build: linux-AMD64 Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins Al Slater, Scott Rhine, Mike Wisner, Ken Goss Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR, Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner, Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone, Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root, Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer, Vangel Bojaxhi, Ben England, Vikentsi Lapa, Alexey Skidanov, Sudhir Kumar. Run began: Mon Aug 24 08:42:20 2026 Auto Mode Machine = Linux oleg422-client.virtnet 4.18.0rh8.10-debug #2 SMP Mon Jul 14 01 Excel chart generation enabled Excel chart generation enabled Verify Mode. Pattern dbdbdbdb Performance measurements are invalid in this mode. Using maximum file size of 102400 kilobytes. Using Maximum Record Size 512 kB Command line used: iozone -a -M -R -V 0xab -g 100M -q 512k -i0 -i1 -f /mnt/lustre/d4.lustre-rsync-test/d0.iozone-oleg422-client.virtnet/iozone-file Output is in kBytes/sec Time Resolution = 0.000001 seconds. Processor cache size set to 1024 kBytes. Processor cache line size set to 32 bytes. File stride size set to 17 * record size. random random bkwd record stride kB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread 64 4 1730 5810 528618 481234 64 8 5260 15829 831569 688639 64 16 1684 26390 901377 901377 64 32 4316 49346 1124074 818885 64 64 4842 67364 1484662 1429325 128 4 5132 5572 373396 460514 128 8 6607 12336 757430 319983 128 16 5379 26096 1102844 357483 128 32 9774 15666 1040839 953918 128 64 4823 26106 1155043 1254941 128 128 4619 113077 1451764 1598754 256 4 3242 8441 602276 469743 256 8 11376 15612 557554 409699 256 16 6400 34781 69377 850956 256 32 14667 29913 1280084 879535 256 64 7842 27461 1319408 1195962 256 128 22918 63822 494400 1312954 256 256 14868 128073 255542 1084800 512 4 3573 3289 504363 375906 512 8 6444 25532 560144 741072 512 16 15168 30384 213238 171746 512 32 24987 40461 494150 164195 512 64 20680 24896 1273861 812884 512 128 6775 48640 872320 1158418 512 256 11702 39260 1647088 1399189 512 512 14314 24506 378424 1662389 1024 4 3272 5121 157753 501466 1024 8 5605 7357 821876 433887 1024 16 9037 24774 601215 289519 1024 32 16062 34160 1186518 1073257 1024 64 34504 40254 242546 1014925 1024 128 13783 32263 432794 584444 1024 256 12280 74924 1096548 531897 1024 512 21822 62840 326842 847667 2048 4 4964 4138 215801 101361 2048 8 7853 15401 811764 219720 2048 16 12804 10859 623054 191402 2048 32 19421 32953 292236 137827 2048 64 18555 22783 1287304 1091089 2048 128 21251 39386 1614101 745537 2048 256 34706 68318 1099890 663427 2048 512 45335 57269 1102856 887682 4096 4 5021 4573 255330 289122 4096 8 9103 10839 748128 189251 4096 16 15812 17994 480303 220821 4096 32 16758 34386 507877 474833 4096 64 30639 31276 1205705 359646 4096 128 34795 39242 655574 416473 4096 256 31150 34501 374780 727011 4096 512 28423 42324 624091 571427 8192 4 5761 7818 351996 231838 8192 8 9822 8783 489861 371284 8192 16 12272 20354 524826 552809 8192 32 19572 24058 512099 296381 8192 64 26064 36161 892187 644287 8192 128 24774 55414 692013 578662 8192 256 37942 48817 969359 603768 8192 512 44334 49062 827969 577874 16384 4 5558 6860 229854 181991 16384 8 10096 11850 511614 406237 16384 16 13768 21211 775975 725985 16384 32 25172 28309 338765 343926 16384 64 23069 35846 686441 363088 16384 128 23935 26875 200595 266462 16384 256 25759 42916 883944 770252 16384 512 33399 50120 657434 843361 32768 4 5239 5269